Is designating Thursday specifically for standing in night prayer, given that it is a day off, considered an innovation?

Question:
He asks and says: Is designating a specific day of the week for standing in night prayer, assuming it is Thursday because it is the day before the day off, considered an innovation? May Allah reward you with good.

Answer:
Yes, designating a specific day of the week for standing in night prayer has no evidence for it. What is required of the Muslim is to stand in night prayer whenever it is easy for him to do so, on any night. If he stands every night with whatever is easy for him, that is better. Continuing the righteous deed is better and more complete. If he has circumstances that prevent him from doing so, he is excused. However, it is better to make up what he missed during the day, between the rising of the sun and its zenith. He makes up what he left of standing in night prayer, including the witr in it. If he prays five rak'ahs, he prays six rak'ahs during the day, every two rak'ahs with a taslim, and so on. Yes.